org.apache.directory.server.core.partition.impl.btree.jdbm

Class KeyBTreeCursor<E>

java.lang.Object

org.apache.directory.shared.ldap.cursor.AbstractCursor<E>

org.apache.directory.server.core.partition.impl.btree.jdbm.KeyBTreeCursor<E>

All Implemented Interfaces:

Iterable<E>, org.apache.directory.shared.ldap.cursor.Cursor<E>

public class KeyBTreeCursor<E>
extends org.apache.directory.shared.ldap.cursor.AbstractCursor<E>

Cursor over the keys of a JDBM BTree. Obviously does not return duplicate keys since JDBM does not natively support multiple values for the same key.

Version:

$Rev$, $Date$

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
KeyBTreeCursor(BTree btree, Comparator<E> comparator) Creates a Cursor over the keys of a JDBM BTree.

Method Summary

Modifier and Type	Method and Description
void	after(E element)
void	afterLast()
boolean	available()
void	before(E element)
void	beforeFirst()
boolean	first()
E	get()
boolean	isElementReused()
boolean	last()
boolean	next()
boolean	previous()

Methods inherited from class org.apache.directory.shared.ldap.cursor.AbstractCursor

checkNotClosed, close, close, isClosed, iterator, setClosureMonitor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

KeyBTreeCursor

public KeyBTreeCursor(BTree btree,
                      Comparator<E> comparator)
               throws Exception

Creates a Cursor over the keys of a JDBM BTree.

Parameters:

btree - the JDBM BTree to build a Cursor over

comparator - the Comparator used to determine key ordering

Throws:

Exception - of there are problems accessing the BTree

Method Detail

available

public boolean available()

before

public void before(E element)
            throws Exception

Throws:

Exception

after

public void after(E element)
           throws Exception

Throws:

Exception

beforeFirst

public void beforeFirst()
                 throws Exception

Throws:

Exception

afterLast

public void afterLast()
               throws Exception

Throws:

Exception

first

public boolean first()
              throws Exception

Throws:

Exception

last

public boolean last()
             throws Exception

Throws:

Exception

previous

public boolean previous()
                 throws Exception

Throws:

Exception

next

public boolean next()
             throws Exception

Throws:

Exception

get

public E get()
      throws Exception

Throws:

Exception

isElementReused

public boolean isElementReused()